Which of the following pairs represents free-living,nitrogen-fixing,aerobic bacteria?

  • A
    Rhizobium and Frankia
  • B
    Azotobacter and Beijerinckia
  • C
    Anabaena and Rhodospirillum
  • D
    Pseudomonas and Thiobacillus

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Similar Questions

$Azotobacter$ is a.......

Which one of the following elements plays an important role in biological nitrogen fixation?

Choose the incorrect pair$(s)$:
$(I)$ Free-living nitrogen-fixing aerobic microbes - Beijerinckia
$(II)$ Rhodospirillum - Aerobic microbes
$(III)$ Bacillus - Free-living
$(IV)$ Cyanobacteria - Anabaena and Azotobacter

Enzyme nitrogenase is responsible for

How many electrons and protons are required to fix a molecule of dinitrogen $(N_2)$ (in each)?

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